Jurnal Ilmu Dasar最新文献_第2页

Analysis of SIR Mathematical Model for Malaria Disease: A Study in Assam, India 疟疾疾病SIR数学模型分析:印度阿萨姆邦的一项研究

Jurnal Ilmu Dasar Pub Date : 2023-07-25 DOI: 10.19184/jid.v24i2.38917

R. Devi, Balendra Kumar Dev Choudhury

{"title":"Analysis of SIR Mathematical Model for Malaria Disease: A Study in Assam, India","authors":"R. Devi, Balendra Kumar Dev Choudhury","doi":"10.19184/jid.v24i2.38917","DOIUrl":"https://doi.org/10.19184/jid.v24i2.38917","url":null,"abstract":"The global outbreak of covid-19 pandemic is still affecting people around the globe very badly. Before the covid-19 pandemic outbreak, several research works were done for the detection and prevention of various infectious diseases using different mathematical modeling. Implementing mathematical modeling to resolve problems in Biology and physiology is generally called Mathematical Biology, an extremely interdisciplinary area. The applications of mathematical modeling in the analysis of infectious diseases help to concentrate on the necessary processes associated with forming the infectious disease epidemiology and specifications estimation. The compartmental mathematical model can be either SI, SIS, SIR, SIRS, or SEIR where S, I, R, and E denote susceptible, infected, recovered, and exposed respectively. Malaria is an infectious disease that has a large economic and health impact on society. This study aims to predict the estimation of suspected, infected and recovered people using the SIR mathematical model of the Barama area of Baksa District in Assam, India. Here we analyzed the Basic Reproductive Ratio of the SIR model for malaria disease and examined if malaria is epidemic or endemic in that area.","PeriodicalId":33444,"journal":{"name":"Jurnal Ilmu Dasar","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48358124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Implementation of Discrete Time Markov Chain Method to Estimate The Transition of Smartphone Brands Usage in Balikpapan 用离散时间马尔可夫链方法估计智能手机品牌在巴厘岛的使用转变

Jurnal Ilmu Dasar Pub Date : 2023-07-10 DOI: 10.19184/jid.v24i2.34872

Anang Asyrofi, I. Anggriani, A. R. Soemarsono

{"title":"Implementation of Discrete Time Markov Chain Method to Estimate The Transition of Smartphone Brands Usage in Balikpapan","authors":"Anang Asyrofi, I. Anggriani, A. R. Soemarsono","doi":"10.19184/jid.v24i2.34872","DOIUrl":"https://doi.org/10.19184/jid.v24i2.34872","url":null,"abstract":"The increasingly rapid competition in the industrial world today encourages all companies to be able to compete by prioritizing the products they offer, one of which is smartphones. Indonesia is one of the countries with the largest smartphone market share in Asia, with the number of active smartphone users in Indonesia reaching 177 million people in 2021 according to data released by the Statista research institute in March 2022. With these conditions, many smartphone companies always follow the direction of development of sophisticated communication technology media and offer a variety of complete and attractive facilities to encourage people to buy these products. One method that can be used to model this uncertainty is Discrete Time Markov chain which can be implemented as a tool for decision making and predicting future events. Therefore, this study was conducted to know the shifting pattern of smartphone use by consumers and predict the shift in smartphone market share for the coming period. The results of the study found that the steady state or equilibrium condition was achieved in the 10th period or in 2032 with the steady state percentage of each brand, namely Samsung = 22.49%, Oppo = 20.82 %, Xiaomi = 17.01%, Realme = 11.54%, Vivo = 11.41%, Apple = 10.27%, and other brands = 6.46%. The increase in market share is predicted to occur in the Oppo, Realme, and Vivo brands, while the decrease in market share will occur in the Apple, Samsung, Xiaomi and other brands.","PeriodicalId":33444,"journal":{"name":"Jurnal Ilmu Dasar","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48524408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Review on Physical, Chemical and Optical Properties of Liquid Crystal 液晶的物理、化学和光学性质综述

Jurnal Ilmu Dasar Pub Date : 2023-07-06 DOI: 10.19184/jid.v24i2.35044

V. K. Singh, R. Singh, Reena Dhyani, B. Rawat, P. Rawat, H. Sharma, Dr. Narinder Kumar

引用次数: 0

The Robust Model Predictive Control Design for Linear Interconnected Systems 线性互联系统的鲁棒模型预测控制设计

Jurnal Ilmu Dasar Pub Date : 2023-07-06 DOI: 10.19184/jid.v24i2.36657

Nida Nur Afifah, Departemen Matematika, Fakultas Matematika, dan Ilmu, Pengetahuan Alam

引用次数: 0

Design and Construction of Electrical Energy Source Panel Based on Thermoelectric Generators on Mild Steel Galvalume 基于热电发生器的低碳钢热电板的设计与构造

Jurnal Ilmu Dasar Pub Date : 2023-07-06 DOI: 10.19184/jid.v24i2.26255

Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Unversitas Jember, J. Kimia

引用次数: 0

Characterization of The essential oil of Eucalyptus Leaves (Melaleuca leucadendra) from Pontianak City and Its Activity Against Streptococcus mutans Pontianak市桉树叶挥发油的特性及其抗变形链球菌活性

Jurnal Ilmu Dasar Pub Date : 2023-07-06 DOI: 10.19184/jid.v24i2.33592

M. A. Wibowo, R. Rendi, W. Warsida, P. Ardiningsih, A. Jayuska

{"title":"Characterization of The essential oil of Eucalyptus Leaves (Melaleuca leucadendra) from Pontianak City and Its Activity Against Streptococcus mutans","authors":"M. A. Wibowo, R. Rendi, W. Warsida, P. Ardiningsih, A. Jayuska","doi":"10.19184/jid.v24i2.33592","DOIUrl":"https://doi.org/10.19184/jid.v24i2.33592","url":null,"abstract":"Eucalyptus plants can grow in the city of Pontianak, which is an area with peat soil, although in fact, this plant can grow well in swamps, sandy areas, and mangroves. The difference in the location where eucalyptus grows, causes a difference in the composition of the compounds contained in it, especially 1.8 cineol which is a potential compound to prevent dental caries. This study aims to isolate and characterize the essential oil of eucalyptus leaves from the city of Pontianak and determine its activity in inhibiting the S. mutans bacteria. This research was carried out in two stages: isolating, characterizing, and determining the chemical content of eucalyptus leaf essential oil from Pontianak using Gas Chromatography-Mass Spectroscopy (GC-MS). The second stage was to test the antibacterial activity in inhibiting the growth of S. mutans bacteria using the well diffusion method. The results of the isolation of essential oils obtained a yield of 0.58% (w/w) with a specific gravity characteristic of 0.9288 g/mL, a clear greenish-yellow color, and a characteristic smell of eucalyptus oil, and is soluble in 70% ethanol. GC-MS analysis showed that there were 29 compounds, with the main compound being 1.8 cineol as much as 55.71%. The results of the antibacterial activity test against S. mutans showed that the samples at all test doses were antibacteria with inhibition values of 9.03 mm (1.393 mg/well), 6.76 mm (0.697 mg/well), 6.53 mm (0.348 mg/well), and 5.39 mm (0.174 mg/well). The follow-up test showed that at all doses of the essential oil, it was bacteriostatic against S. mutans bacteria. From the study results, it can be concluded that Pontianak eucalyptus oil meets the standards of SNI 06-3954-2006 with 1.8 cineol as the main compound and has antibacteria properties against S. mutans.","PeriodicalId":33444,"journal":{"name":"Jurnal Ilmu Dasar","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47284488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anti-Bacterial Activity of Etanolic Extract and Essential Oil of Basil (Ocimum sanctum) on Growth Staphylococcus aureus Salmonella thypii and Eschericia coli 罗勒乙醇提取物和精油对金黄色葡萄球菌、伤寒沙门氏菌和大肠杆菌的抑菌活性研究

Jurnal Ilmu Dasar Pub Date : 2023-07-06 DOI: 10.19184/jid.v24i2.31367

Melania Perwitasari, Reza Anindita, Maya Uzia Beandrade, Dede Dwi Nathalia, Wahyu Nuraini Hasmar, Intan Kurnia Putri

{"title":"Anti-Bacterial Activity of Etanolic Extract and Essential Oil of Basil (Ocimum sanctum) on Growth Staphylococcus aureus Salmonella thypii and Eschericia coli","authors":"Melania Perwitasari, Reza Anindita, Maya Uzia Beandrade, Dede Dwi Nathalia, Wahyu Nuraini Hasmar, Intan Kurnia Putri","doi":"10.19184/jid.v24i2.31367","DOIUrl":"https://doi.org/10.19184/jid.v24i2.31367","url":null,"abstract":"Antimicrobial resistance is one of the biggest health problems. Indonesia is a country with a positive high number of E. coli (71%) Extended Spectrum Beta Lactamase (ESBL) in the Asia Pacific. Many studies report that essential oils and extracts from several species of Ocimum have antimicrobial activity against gram-positive and negative bacteria. Antibacterial activity is related to active compounds contained in plants that are also affected by the place of growth, harvesting and post-harvesting. Research related to the activity of basil (Ocimum sanctum) that already exists does not provide complete and comprehensive data related to where to grow, harvest and post-harvest basil leaves. Basil leaves that have been set parameters for growth, harvest and post-harvest processes are extracted using maceration method with 70% etanol solvent and distilled to obtain essential oils (EO). Etanolic extract (EE) and EO were tested for their activity against Escherichia coli, Staphylococcus aureus and Salmonella thypii bacteria. The results showed that the basil leaves obtained from Margahayu sub-district, East Bekasi, had a dry simplicia yield of 12.8% ± 1.5, yield of EE 16.9% ± 1.6, EO content of 0.56%. The etanolic extract of basil leaves contains alkaloids, saponins, tannins, phenolics, flavonoids, glycosides, triterpenoids and steroids. The conclusion from the results of this study is the etanol extract and essential oils of basil leaves can inhibit the growth of bacteria, both basile leaves. The inhibition zone diameter is higher in gram positive bacteria (S. aureus) than gram negative bacteria (S. thypii and E. coli).","PeriodicalId":33444,"journal":{"name":"Jurnal Ilmu Dasar","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42401614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of Protease from Endophytic Fungi Fusarium sp. JE-DP4a 内生真菌镰刀菌JE-DP4a蛋白酶的研究

Jurnal Ilmu Dasar Pub Date : 2023-07-06 DOI: 10.19184/jid.v24i2.27293

A. Hastuty, I. Herawati, M. R. Pikoli

引用次数: 0

The Effect of Taro Tuber Starch (Colocasia esculenta (L.) schott) Addition to Characteristic of Biodegradable Plastic with PVA Polymer and Calcium Carbonate (CaCO3) Filler 芋淀粉（Colocasia esculenta（L.）schott）的添加对PVA聚合物和碳酸钙（CaCO3）填料生物降解塑料性能的影响

Jurnal Ilmu Dasar Pub Date : 2023-01-27 DOI: 10.19184/jid.v24i1.33409

Endah Saraswati, Intan Syahbanu, Adhitiyawarman Adhitiyawarman

{"title":"The Effect of Taro Tuber Starch (Colocasia esculenta (L.) schott) Addition to Characteristic of Biodegradable Plastic with PVA Polymer and Calcium Carbonate (CaCO3) Filler","authors":"Endah Saraswati, Intan Syahbanu, Adhitiyawarman Adhitiyawarman","doi":"10.19184/jid.v24i1.33409","DOIUrl":"https://doi.org/10.19184/jid.v24i1.33409","url":null,"abstract":"The preparation of biodegradable plastics based on polyvinyl alcohol (PVA)-taro starch as an alternative to synthetic plastics has been conducted. The aim of this research was to identify the effect of taro starch composition on the production of biodegradable plastic and their characteristics in an aquatic environment. The solution casting method was used to produce biodegradable plastic. PVA was dissolved in hot distilled water, and taro starch (0; 0.5; 1.5; 2.5; and 3.5 g) was dissolved in another chamber filled with distilled water, glycerol and citric acid. Both solutions were mixed together and CaCO3 was then added. The mixture was casted on acrylic plates while biodegradable plastic without starch was used as a control. Characteristic of Biodegradable plastic and it’s properties were examined by Fourier Transform Infra Red (FTIR), water uptake, and moisture absorption test. While the biodegrability of the sample were tested in river water media in the laboratory. The results showed that the wave number at 1698-1712 cm-1, indicating that the cross-linking between PVA and the starch occured. Water uptake and moisture absorption tests showed that all of the biodegradable plastic varieties produced were hydrophilic. The biodegradation test showed that the largest degree of decomposition was reached by the PVA-starch 3.5 g variety which was 80.33%. Thus, the more starch on biodegradable plastic, the more biodegradation achieved.","PeriodicalId":33444,"journal":{"name":"Jurnal Ilmu Dasar","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47770589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microcellulose from Betel Husk Fiber as Filler in Bioplastic 槟榔皮纤维微纤维素作为生物塑料填料

Jurnal Ilmu Dasar Pub Date : 2023-01-27 DOI: 10.19184/jid.v24i1.34023

Ratmi Kuswariyah, Berlian Sitorus, Adhitiyawarman Adhitiyawarman, A. Antonius

{"title":"Microcellulose from Betel Husk Fiber as Filler in Bioplastic","authors":"Ratmi Kuswariyah, Berlian Sitorus, Adhitiyawarman Adhitiyawarman, A. Antonius","doi":"10.19184/jid.v24i1.34023","DOIUrl":"https://doi.org/10.19184/jid.v24i1.34023","url":null,"abstract":"Betel nut husk fiber has a reasonably high cellulose content. Meanwhile, bioplastics nowadays are mostly made of Poly Vinyl Alcohol (PVA), with one of its limitations being tensile strength and other properties regarding mechanical. Thus, this study aims to isolate microcellulose from areca nut fiber and use the fiber as a filler in bioplastic, where cellulose is combined with PVA. The intention is to understand the effect of adding microcellulose from betel nut fibers on the properties, including the biodegradability of PVA-based bioplastic films. This research has three steps: isolating cellulose from betel nut peel fibers by delignification, pulping, and bleaching. The next step is hydrolysis to obtain microcellulose. The last is the preparation of bioplastic films using the solution casting method, with five different ratios of microcellulose content in the bioplastic. The cellulose characterization from FTIR spectra shows the absorption of several peaks, such as O-H, C-H, and C-O functional groups. The mechanical testing results on the variation of bioplastic show that the bioplastic with the best characteristics was PL5, which has the highest microcellulose content, 8 MPa and 10.2% for tensile strength and elongation, respectively. The biodegradation test for bioplastic variation (PL5) was 82% within eight weeks, while in Indonesian National Standard (SNI) number 7188.7:2016, it is 100% within 60 days.","PeriodicalId":33444,"journal":{"name":"Jurnal Ilmu Dasar","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43900016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0